Issue #3303442 by TomTech: Loosen assertion in PurchasedEntityAvailableConstraintValidator.

use Drupal\commerce_order\AvailabilityManagerInterface;

use Drupal\commerce_order\Entity\OrderInterface;

use Drupal\commerce_order\Entity\OrderItemInterface;

use Drupal\commerce_store\CurrentStoreInterface;

use Drupal\commerce_store\SelectStoreTrait;

use Drupal\Core\DependencyInjection\ContainerInjectionInterface;

use Drupal\Core\Field\EntityReferenceFieldItemListInterface;

use Drupal\Core\Field\FieldItemListInterface;

use Drupal\Core\Session\AccountInterface;

use Symfony\Component\DependencyInjection\ContainerInterface;

use Symfony\Component\Validator\Constraint;

use Symfony\Component\Validator\ConstraintValidator;

use Drupal\commerce_store\CurrentStoreInterface;

use Drupal\Core\Session\AccountInterface;

/**

 * Constraint validator for validating purchased entity availability.

   * {@inheritdoc}

   */

  public function validate($value, Constraint $constraint) {

    assert($value instanceof EntityReferenceFieldItemListInterface);

    assert($value instanceof FieldItemListInterface);

    if ($value->isEmpty()) {

      return;

    }